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Product Name: APOGEE OXYGEN SENSORS: SO-100, SO-200, & SO-400 Series

APOGEE OXYGEN SENSORS: SO-100, SO-200, & SO-400 Series

Measure gaseous O₂ in the laboratory and underground



Output Options

0 to 50 mV analog


or hand-held meter


Heated Detector

The gas permeable membrane inlet can be heated to prevent water vapor from condensing and blocking the diffusion path. When sensors are used in soil or compost.


Unique Design

Sensors have an internal thermistor fully sealed for temperature monitoring. Sensors are housed in a polypropylene body for long-term use underground. Two head options include a diffusion head for field use and a flow-through head for laboratory use.


Simple Calibration

Voltage output is linearly proportional to absolute amount of oxygen. Calibration is accomplished by measuring the voltage under ambient conditions (atmosphere is 20.95 % O) and deriving a linear calibration factor. A zero offset can be obtained with N gas (recommended for measurements below 10 % O).


Typical Applications

Measurement of O in laboratory experiments or of O gradients in soil/underground

Monitoring gaseous O in indoor environments for climate control, in compost piles, and in mine tailings

Monitoring redox potential in soils

Determination of respiration rates through measurement of O consumption in sealed chambers


Product Specifications:



Manufacturer: Apogee, USA

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